Add local test script for winget dependency injection

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: SteveSandersonMS

test-winget-dependency.ps1

@@ -0,0 +1,79 @@
+<#
+.SYNOPSIS
+    Tests the PowerShell dependency injection into winget manifests.
+.DESCRIPTION
+    Downloads wingetcreate, generates a manifest for an existing package version,
+    injects the PowerShell dependency, and validates the result.
+.PARAMETER PackageId
+    The package ID to test (default: GitHub.Copilot.Prerelease)
+#>
+param(
+    [string]$PackageId = "GitHub.Copilot.Prerelease"
+)
+
+$ErrorActionPreference = "Stop"
+
+# Create temp directory
+$tempDir = Join-Path $env:TEMP "winget-test-$(Get-Random)"
+New-Item -ItemType Directory -Path $tempDir -Force | Out-Null
+Push-Location $tempDir
+
+try {
+    Write-Host "Working in: $tempDir" -ForegroundColor Cyan
+    
+    # Download wingetcreate
+    Write-Host "Downloading wingetcreate..." -ForegroundColor Cyan
+    curl.exe -JLO https://aka.ms/wingetcreate/latest
+    
+    # Get the latest version from winget-pkgs to use as a reference
+    Write-Host "Fetching existing manifest for $PackageId..." -ForegroundColor Cyan
+    .\wingetcreate.exe update $PackageId --out manifests 2>&1 | Out-Null
+    
+    if (-not (Test-Path manifests)) {
+        throw "Failed to generate manifests directory"
+    }
+    
+    # Find and modify the installer manifest
+    $installerManifest = Get-ChildItem -Path manifests -Filter "*.installer.yaml" -Recurse | Select-Object -First 1
+    if (-not $installerManifest) {
+        throw "Could not find installer manifest"
+    }
+    
+    Write-Host "Found installer manifest: $($installerManifest.FullName)" -ForegroundColor Cyan
+    Write-Host "`n--- BEFORE ---" -ForegroundColor Yellow
+    Get-Content $installerManifest | Select-Object -First 20
+    
+    # Apply the dependency injection (same logic as workflow)
+    $content = Get-Content $installerManifest -Raw
+    $dependency = @"
+Dependencies:
+  PackageDependencies:
+    - PackageIdentifier: Microsoft.PowerShell
+      MinimumVersion: "7.0.0"
+"@
+    $content = $content -replace '(?m)^Installers:', "$dependency`nInstallers:"
+    Set-Content -Path $installerManifest -Value $content -NoNewline
+    
+    Write-Host "`n--- AFTER ---" -ForegroundColor Green
+    Get-Content $installerManifest | Select-Object -First 25
+    
+    # Validate the manifest using winget CLI if available
+    Write-Host "`n--- VALIDATING ---" -ForegroundColor Cyan
+    if (Get-Command winget -ErrorAction SilentlyContinue) {
+        winget validate $installerManifest.Directory.FullName
+        if ($LASTEXITCODE -eq 0) {
+            Write-Host "`n✓ Validation passed!" -ForegroundColor Green
+        } else {
+            Write-Host "`n✗ Validation failed!" -ForegroundColor Red
+            exit 1
+        }
+    } else {
+        Write-Host "winget CLI not available - skipping validation" -ForegroundColor Yellow
+        Write-Host "✓ Dependency injection succeeded (manual review above)" -ForegroundColor Green
+    }
+}
+finally {
+    Pop-Location
+    # Cleanup
+    Remove-Item -Path $tempDir -Recurse -Force -ErrorAction SilentlyContinue
+}